/* 
*/ 

#include <iostream>

int main()
{
	std::cout << "Enter two numbers:" << std::endl;
	int v1, v2; 
	std::cin >> v1 >> v2; // read input

	// use smaller number as lower bound for summation
	// and larger number as upper bound
	int lower, upper;
	if (v1 <= v2) {
		lower = v1;
		upper = v2;
	} else {
		lower = v2;
		upper = v1;
	}

	int sum = 0;

	// sum values from lower up to and including upper
	for (int val = lower; val <= upper; ++val) 
		sum += val;  // sum = sum + val
	
	std::cout << "Sum of " << lower 
	          << " to " << upper 
	          << " inclusive is " 
	          << sum << std::endl;

	return 0;
}
